Modeling & Simulation Software Developer

Overview

LMI is seeking a skilled Modeling & Simulation Software Developer in the Washington, DC region to join one of our Modeling & Simulation customer development teams. Successful Forward Deployed Engineers demonstrate competency in integrating advanced technologies into existing business processes, building new functionality, ensuring successful software development, analysis, or deployments, and working closely with customers. This role requires a combination of technical skills, strong communication, and the ability to quickly turn ideas into production caliber code. This role will work as part of the Sales Engineering team and engage directly with customers on-site, in a hybrid format, or remotely, as required by each customer including the potential for occasional short-term travel to customer locations across the United States.

This is a 100% remote role with quarterly travel for in person team planning and collaboration events. This position requires the ability to obtain a Secret clearance; active Secret clearance preferred. You must be a U.S. citizen.

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.

Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors—helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

Why Join Us 

At LMI, you will work on innovative solutions that directly impact national security, logistics, and decision-making for some of the government’s most complex challenges. You will be part of a collaborative team building a secure, cloud-native platform that redefines how modeling and simulation informs operations. 

Responsibilities

• Design, implement, and maintain analytical models within our M&S capability called RAPTR. 
• Perform testing and validation of models and code to ensure accurate outputs.
• Perform operations research analyses with RAPTR to answer client questions and recommend efficient courses of action.
• Participate in client meetings to understand requirements and to brief your technical findings and analyses.
• Collaborate with other RAPTR software engineers, modelers, and analysts to optimize performance for large-scale simulations. 
• Implement monitoring, logging, and alerting to ensure system reliability and availability. 
• Troubleshoot issues across cloud infrastructure, networks, and simulation workloads. 
• Stay current with advances in cloud technologies and recommend improvements to enhance RAPTR capabilities. 

Qualifications

Minimum Qualifications:

• Eligibility to obtain a Secret clearance, Active Secret clearance preferred.
• Bachelor’s degree in Computer Science, ORSA, Data Science, or related field (or equivalent work experience).
• 5+ years in performing complex data analytics such as building AI/ML models, or physics-based models.
• Previous experience with modeling and simulation (M&S) tools.
• Experience building simulation models.
• Experience with briefing and engaging with DoD customers. 
• Strong problem-solving skills and ability to work in a collaborative, fast-paced environment.
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Desired Qualifications:

• Experience with cloud infrastructure (AWS, Azure, or GCP).
• Ability to obtain TS/SCI clearance.
• Knowledge of DoD cloud security requirements (IL4/IL5, FedRAMP, CMMC). 
• Experience working in Agile development teams.
• Domain experience with logistics or supply chains a plus. 

Applicants must meet eligibility requirements for a U.S. Government security clearance. Only US Citizens are eligible for a security clearance. For this position, LMI will only consider applicants with security clearances or applicants who are eligible for security clearances, due to the nature of the work.